. Class-book of botany [microform] : being outlines of the structures, physiology, and classification of plants : with a flora of the United States and Canada. Botany; Botany; Plants; Plants; Botanique; Botanique; Plantes; Botanique. Diagrams of pinnate-veined leaf-forms. 119, orbicular, 120, oval. 121, elliptical, 122, oblong, 128, cuneiform. 124, spathulate, 125, oblanceolate, 126, obovate, 127, deltoid, 128, lanceolate, 129, 205. Feather-veined leaves. Of these, the following forms depend upon the length of the veinlets in relation to each other and to the midvein. When the lower ve
. Class-book of botany [microform] : being outlines of the structures, physiology, and classification of plants : with a flora of the United States and Canada. Botany; Botany; Plants; Plants; Botanique; Botanique; Plantes; Botanique. Diagrams of pinnate-veined leaf-forms. 119, orbicular, 120, oval. 121, elliptical, 122, oblong, 128, cuneiform. 124, spathulate, 125, oblanceolate, 126, obovate, 127, deltoid, 128, lanceolate, 129, 205. Feather-veined leaves. Of these, the following forms depend upon the length of the veinlets in relation to each other and to the midvein. When the lower veinlets are longer than the others, the form of the blade will be (1) ovate, with the out- line of an egg, the broad end at the base; (2) lanceolate, or lance- shaped, narrower than ovate, tapering gradually upwards; (S)deltoid or triangular shaped, like the Greek letter A. a. If the middle veinlets exceed the others in length, the leaf will be (4) orbicular, roundish or quite circular; (5) elliptical, with the outline of an ellipse, nearly twice longer than broad; (6) oval, broadly elliptical; (7) oblong, narrowly elliptical. 266. When the veinlets are more largely developed in the upper region of the leaf its form becomes (8) obovate, inversely ovate, the narrow end at base; (9) oblavxeolate, that is, lanceolate with the narrow end at base; (10) spatulate, like a spatula, with a narrow base and a broader, rounded apex; (11) cuneate or cuneiform, shaped like a wedge with the Doint backwards. 267. Again, if tub lowest pair of veinlets are lengthened and MORE OR LESS RECURVED, the Icaf wiU be variously modified in respect to its base, becoming (12) cordate, or heart-shaped, an ovate outline with a sinus or reentering angle at base; (If.) auriculate, with ear- shaped lobes at base; (14) sagittate, arrow-shaped, with the lobes pointed, and directed backwards; (15) Aas^a^e,halbert-shaped, the lobes directed outwards. ''^,. Please note that these images are extracted from scanned pag
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Keywords: ., bookcentury1800, bookdecade, booksubjectbotany, booksubjectplants
